本研究基于色玻璃凝聚形式体系,在小 $x$ DIS 中以 NLO 精度计算胶子对单举强子产生的贡献,处理共线发散并给出有限 $N_c$ 的 Wilson 线表达式。
摘要:
我们利用 Color Glass Condensate(色玻璃凝聚)形式体系,在小 $x$ 的 Deep Inelastic Scattering(DIS,深度非弹性散射)中,以 next-to-leading order(NLO,次领头阶)精度计算了胶子对单举强子产生的贡献。结果表明,唯一存在的发散是标准的共线发散,它被吸收到胶子—强子碎裂函数的演化中。我们的计算在有限 $N_c$ 下进行,并给出了单举双强子和单强子产生截面中 Wilson 线结构的通用有限 $N_c$ 表达式。我们还评述了如何从所得结果获得强子多重数的快度分布。
英文摘要:
We calculate the contribution of gluons to single inclusive hadron production at next-to-leading order (NLO) accuracy in Deep Inelastic Scattering (DIS) at small $x$ using the Color Glass Condensate formalism. It is shown that the only divergence present is the standard collinear divergence which is absorbed into evolution of gluon-hadron fragmentation function. Our calculations are performed at finite $N_c$ and we provide general finite $N_c$ expressions for the structure of Wilson lines appearing in inclusive dihadron and single hadron production cross sections. We also comment on how one can obtain rapidity distribution of hadron multiplicities from our results.
Accessing gluon polarization with high-$P_T$ hadrons in SIDIS
Wichita State University(威奇托州立大学);South China Normal University(华南师范大学);University of California, Los Angeles(加州大学洛杉矶分校);Jefferson Lab(杰弗逊实验室);University of Adelaide(阿德莱德大学)
Constraining the Dipole Amplitude at NLO with HERA Data and Probing Gluon Saturation in SIDIS
Department of Physics, University of Jyv\"askyl\"a, P.O. Box 35, 40014 University of Jyv\"askyl\"a, Finland;Helsinki Institute of Physics, P.O. Box 64, 00014 University of Helsinki, Finland
Study of SIDIS Unpolarized Cross Sections from a $^3$He Target with the Solenoidal Large Intensity Device at JLab
Department of Physics, Christopher Newport University(克里斯托弗纽波特大学物理系);Jefferson Lab(杰斐逊实验室);Physics Department, Duke University(杜克大学物理系);Triangle Universities Nuclear Laboratory(三角大学核实验室);Physics Department, Indiana University(印第安纳大学物理系);Department of Physics and Astronomy, Mississippi State University(密西西比州立大学物理与天文学系);Division of Science, Penn State University Berks(宾夕法尼亚州立大学伯克斯学院科学系);Department of Physics, Syracuse University(雪城大学物理系)
Single Transverse-Spin Asymmetry in Open Charm Production in SIDIS
讨论了在半包容DIS(SIDIS),$e p^\uparrow \rightarrow e D X$中大横动量$D$介子产生中观察到的单横自旋不对称性。这种贡献体现为共线因子分解中的twist-3机制,它是由横极化核子内部的纯胶子关联,特别是三胶子关联效应引起的。我们导出了首阶QCD中相应SSA的第一个完整公式,揭示了产生的$D$介子的五种独立结构对方位角的依赖关系.我们的结果服从普遍的结构背后的SSA在各种硬过程。本文给出了与未来电子离子对撞机相关的运动学条件下$D$ -介子产生的SSA公式的数值计算。
Revisiting Unidentified Charged-Hadron Fragmentation Functions with Modern COMPASS SIDIS Multiplicities
School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM)(粒子与加速器学院,基础科学研究院);AGH University, Faculty of Physics and Applied Computer Science(AGH科技大学,物理与应用计算机科学学院);PRISMA ++ Cluster of Excellence, Institut für Physik, Johannes Gutenberg-Universität Mainz(PRISMA++卓越集群,物理研究所,约翰内斯·古腾堡美因茨大学);Institut für Theoretische Physik, Universität Münster(理论物理研究所,明斯特大学)
Modern Determination of Pion and Kaon Fragmentation Functions from SIA and High-Precision COMPASS SIDIS Multiplicities
School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM)(粒子与加速器学院,基础科学研究院);AGH University, Faculty of Physics and Applied Computer Science(AGH科技大学,物理与应用计算机科学系);PRISMA ++ Cluster of Excellence, Institut für Physik, Johannes Gutenberg-Universität Mainz(PRISMA ++ 卓越集群,物理学研究所,约翰内斯·古腾堡美因茨大学);Institut für Theoretische Physik, Universität Münster(理论物理研究所,明斯特大学)
Phenomenological Estimate for the Longitudinal Unpolarized Structure Function in Semi-inclusive Deep Inelastic Scattering
Università di Pavia(帕维亚大学);INFN, Sez. di Pavia(意大利国家核物理研究所帕维亚分部);Université Paris-Saclay - CEA - IRFU(巴黎-萨克雷大学法国原子能委员会IRFU);Penn State University Berks(宾夕法尼亚州立大学伯克斯分校);Old Dominion University(老道明大学);Jefferson Lab(杰斐逊实验室)
Matching between Collinear Twist-3 and TMD Fragmentation Function Contributions to Polarized Hyperon Production in SIDIS
Graduate School of Science and Technology, Niigata University(新潟大学科学技术研究生院);Department of Physics, Niigata University(新潟大学物理系);State Key Laboratory of Nuclear Physics and Technology, Institute of Quantum Matter, South China Normal University(华南师范大学量子物质研究所核物理与技术国家重点实验室);Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, Guangdong Provincial Key Laboratory of Nuclear Science(广东省物质结构与基本相互作用卓越基础研究中心、广东省核科学重点实验室)
Threshold resummation of Semi-Inclusive Deep-Inelastic Scattering
Università di Milano(米兰大学);INFN, Sezione di Milano(意大利国家核物理研究所,米兰分部);Dipartimento di Fisica, Università di Genova(热那亚大学物理系);INFN, Sezione di Genova(意大利国家核物理研究所,热那亚分部);II. Institut für Theoretische Physik, Universität Hamburg(汉堡大学第二理论物理研究所)